What is an application number? (RMIT)

I don't know what my "application number" is, and RMIT is requesting I put it on the selection task, along with my full name... I've looked on my emails to try and find it without any success...

Is it just my VTAC ID or something?

RMIT is currently shut and won't open until Jan 2 2025, with the selection task being due Jan 1 2025...

If anybody has the answer to what the application number is, it will be greatly appreciated...

Cheers